If you are going to play a sorceror (especially if you're soloing him/her) write down the spells at each level you think you'll use. And the ones you NEED-typically True sight, breach, minor spell turning, spell shield, spell immunity, secret word, stone skin and ONE type of armour.
Then work out what order you are going to get the spells-the must haves first.
If you don't I can virtually guarantee you'll come up against someone you won't be able to hurt because you don't have the right spell availanle and you don't want to be relying on scrolls all the time.
Incidently you only need two spells for anti spell attacks-secret word and ruby ray of reversal.
Also be careful of how many of a certain type of spell you select-you probably dont need all the sequencers, contingencies etc.
You only need a couple of summon spells and you certianly don't need more than a few armour spells, if you get one of each at each level you'll limit your spell selection dramatically and you don't want that.
And whatever you do get Mordenkanen's sword-its great.
Have fun
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TUOR, Excrutiatingly Jolly Aerie executioner of the HADB and all round not so nice guy.